1. RTS2 Basic Customization
Lecturer:Linlin Zheng

2. Content
Background
Project Plan
Demo
Results

3. Content
Background
Working Plan
Demo
Results

4. Background The goal of the project
This work is based on software system upgrade project about 2.4m telescope in Lijiang observatory.
The goal of the project
Change the operating system from QNX to LINUX
Code must be modular and extensible
Retain the original basic hardware

5. Content
Background
Project Plan
Demo
Results

6. Project Plan
Lijiang Observatory 2.4 m telescope basic control architecture
TCC caculates the real-time state which the telescope should achieve, and sends it to MCC for execution.
MCC calculates the specific operation, transmits command to Control nodes and monitoring the movements.
What’s control nodes?
Telescope Control Computer(TCC)
Main Control Computer(MCC)
Control Nodes

7. Project Plan The usage of rts2 Advantages
1) The original program has no source code.
2) rts2 can be distributed compiled and has its own protocol.
3) The code of rts2 is modular and extensive.

8. Project Plan The usage of rts2 The unconveniences for the project
1) rts2 is hardware-independent. And in this project, code for control nodes should be refactored.
2) Error controlling, such as mechanical error controlling, should be handled very carefully.

9. Project Plan
Demo used in the project (an alt-azimuth telescope)

10. Project Plan The architecture of the demo
Build two simple control nodes.
Extend the code of
rts2 by mainly
refactoring rotated
part and teld part

11. Project Plan advantages Can meet the requirements of the users better.
Can make the maintenance and the replacement of hardware more easily.

12. Content
Background
Project Plan
Demo
Results

13. Demo alt/az control node(finished)
The concrete command communicated with PC:
description of command
send
receive
start to accept command O #
move to alt/az
r1000,2000#
move accuratly to alt/az
R1000,-2000#
get alt/az G
1000,2000#
stop moving S
judge movement J
0# or1#

14. Demo alt/az control on PC(finished)
Practising the basic method to use rts2
program
compile and integrate
debug

15. Demo(specific functions)
Name of function
Function
Control()
Constructor, mainly set the default serial port parameters;
~Control()
Structure analysis function, delete the pointer when there is no need;
ProcessOption()
Define command line parameters, e.g. specifying the serial port;
StartResync()
Pointing to designated stars and the movement control；
moveAltAz()
Move the telescope by sending altitude and azimuth;
StartTrackingControl()
Track the star by sending command in certain interval.
StopMove()
Stop moving
init()
Initialization function, setting pointers for serial port and so on;
Name of function
Function
initValue()
Set the initial value, rend longitude, latitude, altitude and other information in the configuration file rts.ini;
Info()
Get information about telescope
isMoving()
Judge whether the telescope is moving;
getDeg()
Function communicate with zedboard, called by info() and so on , then the current telescope pointing coordinates will be returned.
SetDeg()
Function communicate with zedboard, called by moveAltAz () and so on , then the telescope will move to specific pointing coordinates.
restart()
Restart the telescope after stop

16. Demo rotator control node(continued)
The concrete command communicated with PC:
description of command
send
receive
stop moving S #
judge movement J
0# or1#
Angle to rotate
M+1000#

17. Demo rotator control on PC(continued)
Communication with other module is the emphasis in this part.
value
event

18. Content
Background
Project Plan
Demo
Results

19. Results
For the control of alt/az
The interactive interface

20. Results
Results showed in Hyper Terminal:

21. Thank You !